Clover Bamboo Circular Needle surface grips yarn more readily. All 9" circular sizes have a stainless steel curved joint for extra stability between the needle and cord. The 16", 24", 29", and 36" US sizes 0, 1, and 2 of the original style needle have a stainless steel joint for extra stability between the needle and cord. The Takumi needles have a swivel joint so the cable can't bind up. Can be ideal for loose knitters or projects using slippery yarns.